Israel appeared to be expanding its air campaign against Tehran five days after its surprise attack on Iran’s military and nuclear program, as U.S. President Donald Trump posted an ominous message warning residents of the capital to evacuate.

Israel has launched a series of strikes against Iran, targeting the country’s nuclear program and other military infrastructure. Iran has launched its own strikes in retaliation.

When Israel launched its series of strikes against Iran last week, it also issued a number of dire warnings about the country’s nuclear program, suggesting Iran was fast approaching a point of no return in its quest to obtain nuclear weapons and that the strikes were necessary to preempt that outcome.

Israel stunned Iran last week with an intelligence and military operation years in the making that struck high-level targets with precision.

Israel’s military said it hit command centers of Iran’s Revolutionary Guard, while Iranian strikes overnight killed several people.

By Crispian Balmer, Michael Martina and Matt Spetalnick JERUSALEM/WASHINGTON (Reuters) -Israel's surprise attack on Iran had an obvious goal of sharply disrupting Tehran's nuclear programme and lengthening the time it would need to develop an atomic weapon.

The conflict between Israel and Iran has wreaked considerable damage in both countries and caused casualties on both sides.

Israel's airstrikes have deepened a climate of fear within Iran, where there is a shortage of reliable information. A woman in Tehran said one of the worst things about the attacks is that they usually come without warning.